Oh, is my face red!!!! I kept thinking this was a triangle! That's why I thought I needed the height! I have been busting my brain over this for hours, and the only problem was that I was misreading it. Even after I typed the question into the forum post, I still didn't catch it. When you typed the word "block," that did it for me! Thank you so much! It's either getting really late, or I'm getting really old!!!!